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A kind of al-zn-mg aluminum alloy medium-thick plate and preparation method thereof

A technology for aluminum alloys and plates, which is applied in the field of Al-Zn-Mg aluminum alloy medium-thick plates and its preparation, and aluminum alloy plates, which can solve the problems of surface grain, uneven color, and low surface hardness, and achieve reduction The effect of crack tendency, reduction of residual stress, and improvement of strength and hardness

Active Publication Date: 2017-11-03
广西南南铝加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the IT thick plate prepared by the prior art has the following disadvantages: (1) there are grains on the surface; (2) the color is uneven after anodizing; (3) the surface hardness is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An Al-Zn-Mg aluminum alloy medium-thick plate, in terms of mass percentage, the aluminum alloy medium-thick plate mainly contains the following elements: Mg 1.0, Zn 6.0, Cu 0.05, Fe 0.08, Si 0.05, Cr 0.05, and The amount is Al and unavoidable elements, each unavoidable element is less than 0.05 and the total is less than 0.15.

[0029] The present invention also provides a method for preparing the above-mentioned Al-Zn-Mg aluminum alloy medium-thick plate, the method comprising the following steps:

[0030] (1) Melting: Mix various raw materials according to weight percentage, heat to 740°C to melt the materials, and keep warm for 3 hours;

[0031] (2) degassing and filtering: degassing the molten aluminum after melting, and then filtering to remove insolubles in the aluminum melt;

[0032] (3) Casting: pour the degassed and filtered aluminum liquid, cool to room temperature, and obtain an ingot with a thickness of 420mm;

[0033] (4) Soaking treatment: place the cast...

Embodiment 2

[0042] An Al-Zn-Mg aluminum alloy medium-thick plate, in terms of mass percentage, the aluminum alloy medium-thick plate mainly contains the following elements: Mg 1.3, Zn 6.5, Cu 0.05, Fe 0.08, Si 0.05, Cr 0.05, and The amount is Al and unavoidable elements, each unavoidable element is less than 0.05 and the total is less than 0.15.

[0043] The present invention also provides a method for preparing the above-mentioned Al-Zn-Mg aluminum alloy medium-thick plate, the method comprising the following steps:

[0044] (1) Melting: Mix various raw materials according to weight percentage, heat to 750°C to melt the materials, and keep warm for 4 hours;

[0045] (2) degassing and filtering: degassing the molten aluminum after melting, and then filtering to remove insolubles in the aluminum melt;

[0046] (3) Casting: pour the degassed and filtered aluminum liquid, cool to room temperature, and obtain an ingot with a thickness of 620 mm;

[0047] (4) Soaking treatment: place the cas...

Embodiment 3

[0056] An Al-Zn-Mg aluminum alloy medium-thick plate, in terms of mass percentage, the aluminum alloy medium-thick plate mainly contains the following elements: Mg 2.0, Zn 7.0, Cu 0.03, Fe 0.07, Si 0.03, Cr 0.02, and The amount is Al and unavoidable elements, each unavoidable element is less than 0.05 and the total is less than 0.15.

[0057] The present invention also provides a method for preparing the above-mentioned Al-Zn-Mg aluminum alloy medium-thick plate, the method comprising the following steps:

[0058] (1) Melting: Mix various raw materials according to weight percentage, heat to 760°C to melt the materials, and keep warm for 5 hours;

[0059] (2) degassing and filtering: degassing the molten aluminum after melting, and then filtering to remove insolubles in the aluminum melt;

[0060] (3) Casting: pour the degassed and filtered aluminum liquid, cool to room temperature, and obtain an ingot with a thickness of 420 mm;

[0061] (4) Soaking treatment: place the cas...

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Abstract

The invention belongs to the technical fields of metal materials and processing thereof and discloses an Al-Zn-Mg aluminum alloy medium-thick plate and a preparation method thereof. The aluminum alloy medium-thick plate mainly comprises the following element components: 1.0-2.0 of Mg, 6.0-7.0 of Zn, less than or equal to 0.05 of Cu, less than or equal to 0.08 of Fe, less than or equal to 0.05 of Si, less than or equal to 0.05 of Cr, and the balance of Al and inevitable elements, wherein each inevitable element is less than 0.05 and the total amount of the inevitable elements is less than 0.15. The Al-Zn-Mg aluminum alloy medium-thick plate is prepared by adopting a hot rolling method, and the prepared aluminum alloy medium-thick plate has the thickness of 5-10mm and the surface hardness more than or equal to 150HV; meanwhile, plate surface is uniform, no blank mark is formed, and colour is uniform and close to natural colour of pure aluminum metal after anodic oxidation, so that the Al-Zn-Mg aluminum alloy medium-thick plate can be widely applied to IT appearance structural components.

Description

technical field [0001] The invention belongs to the technical field of metal materials and processing thereof, and relates to an aluminum alloy plate, in particular to an Al-Zn-Mg aluminum alloy medium-thick plate and a preparation method thereof. Background technique [0002] The exterior structural parts of IT products such as mobile phones, tablet computers, and notebook computers require materials with high strength, good thermal conductivity, electromagnetic shielding, stable dimensions, and good appearance. , cooling, beautiful effect. The commonly used materials are composite plastics of ABC and PC engineering plastics and carbon fiber or glass fiber, and some high-end IT appearance parts are made of alloys of light metals such as magnesium, titanium, and aluminum. With the development of the aluminum industry, aluminum and aluminum alloys will play an important role in IT appearance materials due to their excellent performance. Compared with traditional plastics, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C1/02C22F1/053
CPCC22C1/026C22C21/10C22F1/002C22F1/053
Inventor 莫宇飞郑玉林赵解扬何建贤张航宋丰轩
Owner 广西南南铝加工有限公司
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